Red June Beetle

Systematic position. The insect belongs to the order Coleoptera and the family Scarabaeidae. Phyllophaga fervida is a member of a large and diverse genus of beetles. These insects are well-documented in agricultural entomology due to the significant subterranean impact of their larvae, commonly known as white grubs, on various plant species.

Host plants. These pests are polyphagous, meaning they feed on a wide variety of plants. They are particularly destructive to turfgrass, corn, potatoes, strawberries, and tree nursery stock. The larvae are generalist root feeders, and their feeding activity can impact both ornamental landscapes and commercial agricultural fields, leading to economic losses.

Biology and life cycle. The life cycle of Phyllophaga fervida typically spans two to three years. Adults emerge in late spring or early summer to mate and feed on foliage. Females deposit eggs in the soil near suitable host plants. Upon hatching, the larvae go through three developmental stages (instars). They spend most of their life cycle underground, moving vertically in the soil profile in response to temperature and moisture changes.

Damage and pest impact. The primary damage is caused by the larval stage, which feeds exclusively on roots. By severing the root system, the larvae prevent the plant from absorbing water and nutrients. Infested turf often shows patches of brown, dead grass that can be easily pulled back like a carpet. In row crops, the feeding results in wilting, stunted growth, and in severe cases, the death of the entire plant.

Control measures. Effective management requires an integrated approach. Cultural practices such as keeping the soil surface clear of debris and performing regular tillage help disrupt the larval environment. Biological control using entomopathogenic nematodes or fungi is an effective, environmentally friendly option. In severe infestations, registered soil-applied insecticides can be utilized, provided they are applied according to local agricultural regulations.